Let me put it this way. I went hard Tuesday night and last night was supposed to be my recovery ride. (I also did dumbbell squats Monday and yesterday.) I had that exact soreness, it felt OK at about 13 mph but I couldn't push or get my HR above 150 without pain. With some riding though I loosened up a little, then caught up with my hubby, who doubles as my coach. This was his recovery ride too but his recovery pace is a BIT faster than mine, plus he wanted to gauge my performance in situations like short uphills and other places where I need to pour on a little acceleration to keep my momentum up. So he pushed me pretty hard, and getting frustrated, I started gritting my teeth and letting a little of the pain from my sore muscles show.
"I haven't seen you hurt this bad in a long time," he told me. "You need a night off." I said, "I TOOK a night off Monday!" Without hesitating he said, "Take another. Riding doesn't make you faster. The rest BETWEEN riding is what's important."
So I pass this advice on to you. Now is as good a time as any to rest well. When's the last time you took a day totally off the bike? Because you're due for one.